/Engine/Plugins/Animation/ControlRig/Source/ControlRigEditor/Public/ControlRigSequencerEditorLibrary.h
Get the default world space key, can be used a world space.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Editor Scripting | Sequencer Tools | Control Rig") static [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) GetWorldSpaceReferenceKey()